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Influences of light irradiation on the negative resistance turn-around characteristics of static induction photosensitive thyristor (SIPTH) have been experimentally and theoretically studied. As the gate current of SIPTH is increased by the light irradiation, the potential barrier in the channel is reduced due to the increase in voltage drop across the gate series resistance. Therefore, SIPTH can be quickly switched from the blocking state to the conducting state by relatively low anode voltage. The optimal matching relation for controlling anode conducting voltage of SIPTH by light irradiation has also been represented. 相似文献
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用AFM研究硅基上沉积铜膜生长过程 总被引:2,自引:2,他引:2
室温下,利用磁控溅射在P型Si(111)衬底上沉积了铜(Cu)膜.用原子力显微镜(AFM)对不同沉积时间制备的Cu膜形貌进行了观测,研究了磁控溅射沉积Cu膜时膜在硅衬底上成核和生长方式.Cu膜在Si衬底生长时,Cu的临界核以Volmer-Weber模式生长.溅射时,核长大增高为岛状,岛与岛相互连接构成岛的通道,最后形成连续膜.随着沉积的进行,Cu膜表面粗糙度由于晶粒凝聚和合并而增大.当形成连续致密的、具有一定晶向的Cu膜时,粗糙度反而减小. 相似文献
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室温下,利用磁控溅射方法在P型Si(100)衬底上沉积了铜(Cu)膜.采用X射线衍射(XRD)和卢瑟福背散射(RBS)分析了未退火以及在不同温度点退火后的样品,研究了Cu/SiO3/Si(100)体系的扩散和界面反应.RBS分析得出对于Cu/SiO2/Si(100)体系,当退火温度高于350℃时,才产生明显的扩散,并且随着温度的升高,体系扩散越明显;当退火温度在450℃以下时,XRD没有测得铜硅化合物生成;当温度到500℃时才有铜硅化合物生成.这比已有文献报道的温度低. 相似文献
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